- Resolving power of lens or microscope will be greater if wavelength of light and Diameter of lens will be?
Smaller, smaller
Larger, smaller
None
smaller, larger - If an object is placed b/w F and 2F for concave lens s then image formed will be?
Real,inverted
Virtual ,inverted
Virtual, errect
None of these - Convex lens can be used to form images?
Only virtual
Only real
both real and virtual can be formed
None - Color of light is closely related with?
Frequency
Speed
Wavelength
None - Point source placed at infinity from convex lens will give is a?
A virtual point image at focus
A real point image at focus
Will converge rays and give spherical wavefronts
Both b and c - Concave and convex mirror can form images?
Only real, only virtual
Both real and virtual, only virtual
Virtual, both real and virtual - When light moves from rarer to denser medium the angle of refraction will be?
Less than that of <i
Greater than <i
Equal to <i
None of these - The power of convace lens will be?
+ve
-ve - The image formed by a magnifying glass will be?
Real inverted and on other side of object
Virtual erect enlarged and on same side of lens
May be both virtual and real
All of these - In normal adjustment the length of telescope will be?
qe+po
qo+pe
fo+fe
None of these - The final image formed by compound microscope is?
Real Inverted Enlarged
Virtual inverted Enlarged and at near point
None of these - From going one medium to another which changes:?
speed
frequency
wavelength
a and c - If a lens is immersed in water its focal length will be?
decrease
increase
remains same - A man of height 1.6 m wishes to see his full image in a plane mirror placed at a distance of 2 m. The minimum height of the mirror should be:?
o.5m
1.om
1.5m
none - A bulb is placed between plane mirrors inclined at an angle of 60degree. The number of images formed is:?
3
4
5
6 - The phase difference b/w two points of wave front is?
zero
pi/2
3pi/2
none - Fringe width observed in the Young’s double slits experiments is B. If frequency of source is doubled the fringe width will be:?
B
2B
B/2
B/4
none
18.In Young’s double slit experiment, if there were no diffraction effect, the central point would be?
bright
red
blue
none of these
- If YDS apparatus is immersed in water then fringe spacing will be:?
increased
becomes refractive index times of water
2times
none - In double slit experiment, for light of which color the fringe width will be maximum?
violet
yellow
red
none
